Castor
- #4,707 for boys in 2025, 21 births
- Peak · boys
- 2016 · 29 births
- Debut · boys
- 11 births
- In top 100 · boys
- neverof 146 years
- Total births · boys
- 390since 1998
Castor over time
boys
Rank among boys' names. Castor has never cracked the top 3,000 here.
Hover or use arrow keys to read values by year; click or press Enter to open that year.
Gaps mean fewer than 5 babies received the name that year, so the SSA doesn't publish it.
Show data table
| Year | boys | |
|---|---|---|
| rank | births | |
| 2025 | #4,707 | 21 |
| 2024 | #6,199 | 14 |
| 2023 | #7,289 | 11 |
| 2022 | #5,445 | 17 |
| 2021 | #5,338 | 17 |
| 2020 | #3,918 | 26 |
| 2019 | #4,337 | 23 |
| 2018 | #4,226 | 24 |
| 2017 | #6,060 | 14 |
| 2016 | #3,681 | 29 |
| 2015 | #5,289 | 17 |
| 2014 | #5,066 | 18 |
| 2013 | #5,171 | 17 |
| 2012 | #5,720 | 15 |
| 2011 | #7,502 | 10 |
| 2010 | #8,139 | 9 |
| 2009 | #6,436 | 13 |
| 2008 | #9,019 | 8 |
| 2007 | #8,915 | 8 |
| 2006 | #6,904 | 11 |
| 2005 | #7,640 | 9 |
| 2004 | #9,948 | 6 |
| 2003 | #8,643 | 7 |
| 2002 | #7,643 | 8 |
| 2001 | #6,935 | 9 |
| 2000 | #6,316 | 10 |
| 1999 | #7,139 | 8 |
| 1998 | #5,466 | 11 |
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First appearance
1998
The first year at least five boys were named Castor! It came in at #5,466, and was given to 11 baby boys.
Quietest stretch: 2001–2005, when fewer than 10 boys a year got the name.
Where Castor is popular in 2025
No state had 5 or more boys named Castor in 2025, so the SSA doesn't publish it for any state.
See more about Castor
Momentum · boys
Holding steady
- 1,492 spots since 2024 (#6,199 → #4,707)
- 789 spots since 2020 (#3,918 → #4,707)
- 582 spots since 2015 (#5,289 → #4,707)
Rise & fade · boys
18 yrs to peak
- Debuted 1998
- Peaked 2016 at #3,681 (29 births)
- Births halved by 2017, 1 yr later
Top of the charts · boys
Never in the top 1,000
- Top 10: never
- Top 100: never
- Top 1,000: never
Share of babies · boys
1 in 65,439
- Highest: 1 in 65,439 boys born in 2016 were named Castor (0.00%)
- Latest: 1 in 81,337 boys born in 2025 (0.00%)
Era · boys
The 2010s
- 45.1% of all boys named Castor (176) were born in this decade
Show by decade
| Decade | Births | Best rank | Avg rank |
|---|---|---|---|
| 1990s | 19 | #5,466 (1998) | #6,303 |
| 2000s | 89 | #6,316 (2000) | #7,840 |
| 2010s | 176 | #3,681 (2016) | #5,519 |
| 2020s | 106 | #3,918 (2020) | #5,483 |
All figures count published births only (names given to at least 5 boys in a year). Registrations before 1937 are incomplete, so early shares and totals run low.
Want to check a specific year?
See where Castor ranked and which names it was up against. Click a point on the chart, or pick a year: